Liveno allows you to chat with the other people in an unconventional way.
All you have to do is get a username and find a frequency to join.
"What is a frequency?" you may ask; In Liveno, we call chat rooms frequencies because they hold one message only. New message replaces the older. So it is basically walkie-talkie with text...
In addition to all of that you can chat in a specified frequency with your friends(who has iPhone) nearby(in Wi-Fi & Bluetooth range) without needing an internet connection.